Remove usage of sets module (patch #1500609).
diff --git a/Lib/test/test_mimetools.py b/Lib/test/test_mimetools.py
index 96bbb36..b0b5b01 100644
--- a/Lib/test/test_mimetools.py
+++ b/Lib/test/test_mimetools.py
@@ -1,7 +1,7 @@
 import unittest
 from test import test_support
 
-import string, StringIO, mimetools, sets
+import string, StringIO, mimetools
 
 msgtext1 = mimetools.Message(StringIO.StringIO(
 """Content-Type: text/plain; charset=iso-8859-1; format=flowed
@@ -25,7 +25,7 @@
             self.assertEqual(o.getvalue(), start)
 
     def test_boundary(self):
-        s = sets.Set([""])
+        s = set([""])
         for i in xrange(100):
             nb = mimetools.choose_boundary()
             self.assert_(nb not in s)